/* Header styles for Nestovixa (builds on base.css) */

.nvx-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(246, 247, 249, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.nvx-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

/* Branding */

.nvx-header__branding {
  display: flex;
  align-items: center;
}

.nvx-header__brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--color-neutral-900);
}

.nvx-header__brand-link:hover {
  color: var(--color-neutral-900);
}

.nvx-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: conic-gradient(from 210deg, #e5efff, #6ea5ff, #46b38b, #f6f7f9);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.nvx-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 10px;
  background: radial-gradient(circle at 30% 20%, #ffffff, #f4f6fb);
}

.nvx-header__brand-text {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
}

/* Navigation */

.nvx-header__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1 1 auto;
  margin-left: auto;
  gap: var(--space-4);
}

.nvx-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nvx-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: 0.2rem 0;
}

.nvx-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.25rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nvx-header__nav-link:hover,
.nvx-header__nav-link:focus-visible {
  color: var(--color-neutral-900);
}

.nvx-header__nav-link:hover::after,
.nvx-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

/* Actions */

.nvx-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nvx-header__action-link--primary {
  font-size: var(--font-size-sm);
}

.nvx-header__action-icon {
  display: inline-flex;
  align-items: center;
}

/* Mobile menu toggle */

.nvx-header__menu-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background-color: #ffffff;
  color: var(--color-text);
  font-size: var(--font-size-xs);
}

.nvx-header__menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary-strong);
  outline-offset: 3px;
}

.nvx-header__menu-toggle-icon {
  position: relative;
  width: 18px;
  height: 14px;
}

.nvx-header__menu-toggle-icon::before,
.nvx-header__menu-toggle-icon::after,
.nvx-header__menu-toggle-icon span {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-neutral-800);
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.nvx-header__menu-toggle-icon::before {
  top: 0;
}

.nvx-header__menu-toggle-icon::after {
  bottom: 0;
}

/* Open state */

.nvx-header__menu-toggle[aria-expanded="true"] .nvx-header__menu-toggle-icon::before {
  top: 6px;
  transform: rotate(45deg);
}

.nvx-header__menu-toggle[aria-expanded="true"] .nvx-header__menu-toggle-icon::after {
  bottom: 6px;
  transform: rotate(-45deg);
}

.nvx-header__menu-toggle[aria-expanded="true"] .nvx-header__menu-toggle-icon span {
  opacity: 0;
}

.nvx-header__menu-toggle-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Backdrop for mobile menu */

.nvx-header__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(2px);
  z-index: 35;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.nvx-header__backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* Responsive layout */

@media (max-width: 960px) {
  .nvx-header__menu-toggle {
    display: inline-flex;
  }

  .nvx-header__nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 64px;
    max-height: calc(100vh - 64px);
    background-color: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border-subtle);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4) var(--space-4) var(--space-6);
    gap: var(--space-4);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    box-shadow: var(--shadow-md);
    overflow-y: auto;
  }

  .nvx-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .nvx-header__nav-link {
    font-size: var(--font-size-base);
  }

  .nvx-header__actions {
    justify-content: flex-start;
  }

  .nvx-header__nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
  }
}

@media (max-width: 600px) {
  .nvx-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .nvx-header__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .nvx-header__action-link {
    width: 100%;
    justify-content: center;
  }
}